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| author | Tavian Barnes <tavianator@gmail.com> | 2010-02-25 22:03:11 -0500 |
|---|---|---|
| committer | Tavian Barnes <tavianator@gmail.com> | 2010-02-25 22:03:11 -0500 |
| commit | 40b180db2833e4e6ef835a463ca15ff865ce0d18 (patch) | |
| tree | ebb3f808374d653cd150852e252e68b9addca8d0 /libdimension/raytrace.c | |
| parent | b27ad82573bc70d84bc4213ba00771f4746b36bc (diff) | |
| download | dimension-40b180db2833e4e6ef835a463ca15ff865ce0d18.tar.xz | |
Point the normal vectors away from the object.
Diffstat (limited to 'libdimension/raytrace.c')
| -rw-r--r-- | libdimension/raytrace.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libdimension/raytrace.c b/libdimension/raytrace.c index 3fa873c..826cc58 100644 --- a/libdimension/raytrace.c +++ b/libdimension/raytrace.c @@ -323,7 +323,8 @@ dmnsn_raytrace_light_ray(const dmnsn_raytrace_state *state, shadow_ray = dmnsn_line_add_epsilon(shadow_ray); /* Check if we're casting a shadow on ourself */ - if (dmnsn_vector_dot(shadow_ray.n, state->intersection->normal) < 0.0) + if (dmnsn_vector_dot(shadow_ray.n, state->intersection->normal) + * dmnsn_vector_dot(state->viewer, state->intersection->normal) < 0.0) return dmnsn_black; dmnsn_color color = (*light->light_fn)(light, state->r); |